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Crushing ratio, crushing sections and crushing process of the crusher

Release time:Apr.16.2024 Views:0

The ratio of the particle size of the raw material to the particle size of the crushed finished product is referred to as the crushing ratio, which directly affects the energy consumption and processing capacity of the crusher and is a key factor in measuring the crushing effect of the crusher. (stone crusher)There are three commonly used crushing ratio calculation methods, and different crushing ratio calculation methods have different applicable objects.


        crushing ratio


1. Maximum crushing ratio: the ratio of the largest particle size before and after crushing


Because the width of the feed port of the crusher needs to be selected based on the maximum material diameter, this method is often used in mineral processing plants, quarries, and engineering designs.


However, the habits of different countries are different, and the methods for obtaining the maximum granularity are also different. In Britain and the United States, the width of the sieve hole through which 80% of the material can pass through the sieve hole is the maximum particle size diameter. In my country, the width of the sieve hole through which 95% of the material can pass through the sieve hole is the diameter of the maximum particle size.


2. Surface crushing ratio: the ratio of the width of the inlet of the crusher to the width of the outlet.


Since this method does not require screening and analysis of large quantities of materials, approximate calculations can be made by knowing the width of the inlet and outlet of the crusher, which is more convenient, so it is more commonly used in production. However, it is worth noting that not all crusher discharge particle sizes are determined by the size of the discharge opening.


3. Average crushing ratio: the ratio of the average particle size of materials before and after crushing.


Scientific research and theoretical research often use average particle size to calculate the crushing ratio, because this method can more truly reflect the operating conditions of the equipment and the degree of crushing. The average crushing ratio of a general crusher is between 3-30, and the crushing ratio of a grinder can reach more than 40-400.


If the crushing ratio of the crusher is large, the corresponding needle and flake content will increase. This is true for all types of crushers. However, if the crushing ratio is too small, the output of the entire stone crushing production line will be reduced and the internal circulation volume will be increased, thus Increase the wear of the crusher and reduce the overall economic benefit. Therefore, in the entire stone crushing production process, it is very important to choose the appropriate crushing ratio. Usually the first crushing equipment chooses a jaw crusher with a large crushing ratio, and the secondary crushing equipment chooses an impact crusher or cone crusher with a small crushing ratio.


Broken section


Each time the solid waste passes through the crusher or grinder, it is called a crushing section. For different crushing ratio requirements, the crushing sections are also different. If the required crushing ratio is not large, one-stage crushing is enough. However, for some solid waste sorting processes, such as flotation, magnetic separation, etc., since the particle size of the feed material is required to be very fine and the crushing ratio is large, several crushers or grinders are often connected in series according to actual needs. It is put together to form a crushing process, and the solid waste is crushed multiple times (segments), and the total crushing ratio is equal to the product of the crushing ratios of each segment.


The number of crushing stages is the basic index that determines the crushing process. It mainly determines the original particle size and final particle size of the crushed waste. The more the number of crushing stages, the more complex the crushing process will be, and the engineering investment will increase accordingly. Therefore, if conditions permit, it should Minimize the number of broken segments.

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Machine-made sand process


Crushing process


Depending on the nature of the solid waste, the size of the particles, the required crushing ratio and the type of crusher selected, each crushing process can have different combinations.


There are many types of crushing processes, but according to the configuration conditions of pre-screening and inspection screening, as well as the raw ore particle size and final crushing particle size range in actual production, the most commonly used crushing processes are divided into four types: two-stage open circuit process, two-stage one-stage crushing process. Closed-circuit process, three-stage open-circuit process, three-stage one closed-circuit process.


Since its establishment, Xingaonai Heavy Industry has always maintained the business philosophy of winning by quality, and has continuously strengthened its own intelligent research and exploration. It relies on high-quality product quality, timely and effective after-sales service and pioneering and innovative technology to compete, and has won the The market continues to favor it.